<template>
  <div class="m-iselect">
    <span class="name">按省份选择:</span>
    <el-select v-model="pvalue" placeholder="省份">
      <el-option
        v-for="item in province"
        :key="item.value"
        :label="item.label"
        :value="item.value"
      />
    </el-select>
    <el-select v-model="cvalue" :disabled="!city.length" placeholder="城市">
      <el-option v-for="item in city" :key="item.value" :label="item.label" :value="item.value" />
    </el-select>
    <el-autocomplete
      v-model="input"
      :fetch-suggestions="querySearchAsync"
      placeholder="请输入城市中文或拼音"
      @select="handleSelect"
    />
  </div>
</template>

<script>
import _ from 'lodash';
import { mapMutations } from 'vuex'
export default {
  data() {
    return {
      province: [],
      pvalue: '',
      city: [],
      cvalue: '',
      input: '',
      cities: []
    }
  },
  watch: {
    pvalue: async function (newPvalue) {
      let self = this;
      let { status, data: { city } } = await self.$axios.get(`/geo/province/${newPvalue}`)
      if (status === 200) {
        self.city = city.map(item => {
          return {
            value: item.id,
            label: item.name
          }
        })
        self.cvalue = ''
      }
    }
  },
  mounted: async function () {
    let self = this;
    let { status, data: { province } } = await self.$axios.get('/geo/province')
    if (status === 200) {
      self.province = province.map(item => {
        return {
          value: item.id,
          label: item.name
        }
      })
    }
  },
  methods: {
    querySearchAsync: _.debounce(async function (query, cb) {
      let self = this;
      if (self.cities.length) {
        cb(self.cities.filter(item => item.value.indexOf(query) > -1))
      } else {
        let { status, data: { city } } = await self.$axios.get('/geo/city')
        if (status === 200) {
          self.cities = city.map(item => {            return {
              value: item.name
            }          })
          cb(self.cities.filter(item => item.value.indexOf(query) > -1))
        } else {
          cb([])
        }
      }
    }, 200),
    handleSelect: function (item) {
      window.location.href = '/'
      // 注意
      // this.$router.push('/')

      const city = item.value

      this.setPosition({ city, province: '' })
      // this.$store.commit('geo/setPosition', { city, province: '' });
    },
    ...mapMutations('geo', ['setPosition'])
  }
}
</script>

<style lang="scss">
@import "@/assets/css/changeCity/iselect.scss";
</style>
